/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/MeshTopologySelector.h
For group edges, occlusion is checked at endpoints, and if either is occluded, the edge is considered occluded. For faces, occlusion is checked at triangle centroids.
true if something was selected.
bool FindSelectedElement ( const [FSelectionSettings](API\Plugins\ModelingComponents\Selection\FMeshTopologySelector\FSelectionSettings) & Settings, const [FCameraRectangle](API\Plugins\ModelingComponents\Mechanics\FCameraRectangle) & CameraRectangle, FTransform3d TargetTransform, [FGroupTopologySelection](API\Plugins\DynamicMesh\FGroupTopologySelection) & ResultOut, [TMap](API\Runtime\Core\Containers\TMap)< int32, bool > * TriIsOccludedCache )